:root {
  --bg: #050505;
  --panel: #131313;
  --text: #f4f4f4;
  --muted: #b7b7b7;
  --accent: #4de2ab;
  --danger: #ff6f6f;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  line-height: 1.35;
  background: radial-gradient(circle at 50% 10%, #171717 0%, #070707 40%, #000000 100%);
  color: var(--text);
}

body.session-active {
  display: grid;
  place-items: center;
  background: #000;
}

body.session-active .layout {
  width: min(96vw, 96vh);
  margin: 0;
  grid-template-columns: 1fr;
  gap: 0;
}

body.session-active .panel {
  display: none;
}

body.session-active .viewer-wrap {
  border-color: #000;
  border-radius: 0;
  box-shadow: none;
  background: #000;
}

body.session-active #viewer {
  width: min(96vw, 96vh);
  max-width: 96vw;
  max-height: 96vh;
}

.layout {
  width: min(1200px, 96vw);
  margin: 24px auto;
  display: grid;
  grid-template-columns: minmax(290px, 360px) 1fr;
  gap: 18px;
}

.panel {
  padding: 18px;
  border: 1px solid #2b2b2b;
  border-radius: 16px;
  background: linear-gradient(180deg, #1a1a1a, var(--panel));
}

h1 {
  margin: 0 0 8px;
  font-size: 1.6rem;
}

p {
  margin: 0 0 14px;
  color: var(--muted);
  line-height: 1.4;
}

.intro-copy a,
.intro-copy a:visited {
  color: #dedede;
  text-decoration-color: #9a9a9a;
}

.intro-copy a:hover,
.intro-copy a:focus-visible {
  color: #f4f4f4;
  text-decoration-color: #d0d0d0;
}

.hud {
  display: grid;
  grid-template-columns: repeat(2, minmax(100px, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}

.hud-item {
  padding: 8px 10px;
  border-radius: 10px;
  background: #0c0c0c;
  border: 1px solid #272727;
}

.label {
  display: block;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #8d8d8d;
}

.hud-item strong {
  font-size: 1.15rem;
}

.controls {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
}

.setup-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 170px;
  align-items: center;
  column-gap: 12px;
  row-gap: 8px;
}

.core-setup {
  margin-bottom: 12px;
}

.debug-only {
  display: none;
}

body.debug-mode .debug-only {
  display: revert;
}

body.training-live .intro-copy,
body.training-live .core-setup,
body.training-live .advanced-setup,
body.training-live .instructions {
  display: none;
}

.advanced-setup {
  margin: 0 0 12px;
  border: 1px solid #2f2f2f;
  border-radius: 10px;
  background: #101010;
  padding: 6px 10px 10px;
}

.advanced-setup.needs-attention {
  border-color: #8f7d3a;
  box-shadow: 0 0 0 1px rgb(143 125 58 / 32%);
}

.advanced-setup summary {
  cursor: pointer;
  font-size: 0.88rem;
  color: var(--muted);
  user-select: none;
}

.advanced-setup .setup-grid {
  margin-top: 10px;
}

.advanced-help-list {
  margin: 10px 0 0;
  padding-left: 18px;
  color: #a0a5aa;
  font-size: 0.78rem;
}

.advanced-help-list li {
  margin-bottom: 5px;
  line-height: 1.35;
}

.setup-grid label {
  font-size: 0.9rem;
  color: var(--muted);
  white-space: nowrap;
}

.setup-grid label.monitor-width-label {
  white-space: normal;
  line-height: 1.28;
}

.setup-grid label.has-tooltip {
  cursor: help;
  text-decoration-line: underline;
  text-decoration-style: dotted;
  text-decoration-color: #687482;
  text-underline-offset: 3px;
}

.setup-grid label.has-tooltip::after {
  content: "?";
  display: inline-block;
  margin-left: 6px;
  padding: 0 5px;
  border: 1px solid #4f657c;
  border-radius: 999px;
  color: #aec3d8;
  font-size: 0.69rem;
  line-height: 1.2;
  vertical-align: 1px;
}

.setup-grid label.readonly-label::after {
  content: "RO";
  margin-left: 8px;
  padding: 1px 6px;
  border-radius: 999px;
  border: 1px solid #4d6d8b;
  color: #a8c4dc;
  font-size: 0.63rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.setup-grid input,
.setup-grid select {
  width: 100%;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid #3a3a3a;
  background: #111;
  color: #f2f2f2;
  font-weight: 700;
}

.setup-grid select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, #7a7a7a 50%), linear-gradient(135deg, #7a7a7a 50%, transparent 50%);
  background-position: calc(100% - 16px) calc(50% - 2px), calc(100% - 11px) calc(50% - 2px);
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 30px;
}

.setup-grid input:disabled,
.setup-grid select:disabled {
  opacity: 0.7;
}

.setup-grid input[readonly] {
  background: #0d131a;
  border: 1px dashed #4d6d8b;
  color: #c7dcf0;
  cursor: default;
  font-weight: 600;
}

button {
  border: 0;
  border-radius: 10px;
  padding: 10px 16px;
  font-weight: 700;
  cursor: pointer;
  background: var(--accent);
  color: #02291c;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

button:focus-visible,
.setup-grid input:focus-visible,
.setup-grid select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

button.ghost {
  background: #282828;
  color: #f0f0f0;
}

.status {
  min-height: 22px;
  margin-bottom: 12px;
  color: var(--text);
}

.disclaimer-note {
  margin: 10px auto 14px;
  color: #868686;
  font-size: 0.73rem;
  opacity: 0.72;
  text-align: center;
}

.page-footer-warning {
  width: min(1200px, 96vw);
}

body.training-live .page-footer-warning,
body.session-active .page-footer-warning {
  display: none;
}

.status.danger {
  color: var(--danger);
}

.pause-card {
  margin: -2px 0 12px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid #2e4f6e;
  background: #0f1722;
}

.pause-title {
  display: block;
  margin-bottom: 8px;
  font-size: 0.9rem;
}

.pause-grid {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  column-gap: 10px;
  row-gap: 5px;
  align-items: center;
}

.pause-key {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #a0b6cc;
}

.debug-status {
  margin: -4px 0 12px;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px dashed #33584a;
  background: #0d1512;
  color: #a7f4d6;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.78rem;
  line-height: 1.35;
}

.debug-controls {
  display: flex;
  gap: 8px;
  margin: -6px 0 12px;
}

.debug-btn {
  min-width: 44px;
  padding: 8px 12px;
  font-size: 1.05rem;
  line-height: 1;
}

.instructions {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.instructions li {
  margin-bottom: 6px;
}

kbd {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  background: #202020;
  border: 1px solid #454545;
  border-radius: 6px;
  padding: 1px 6px;
}

.viewer-wrap {
  border-radius: 16px;
  border: 1px solid #2a2a2a;
  overflow: hidden;
  background: #000;
  box-shadow: 0 16px 30px rgb(0 0 0 / 25%);
}

.summary-card {
  width: min(1200px, 96vw);
  margin: 12px auto 24px;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid #2b2b2b;
  background: #121212;
}

.summary-card.hidden {
  display: none;
}

.summary-card h2 {
  margin: 0 0 10px;
  font-size: 1.1rem;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 8px;
}

.summary-grid div {
  padding: 8px 10px;
  border-radius: 9px;
  background: #0c0c0c;
  border: 1px solid #292929;
}

.summary-grid span {
  display: block;
  color: var(--muted);
  font-size: 0.77rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.summary-grid strong {
  font-size: 1rem;
}

#viewer {
  width: 100%;
  height: auto;
  display: block;
  background: #000;
}

@media (max-width: 920px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .setup-grid {
    grid-template-columns: 1fr;
  }
}